I said you (personally) are an unremarkable individual who will leave no kind of mark whatsoever on mankind. I firmly believe that to be true and, indeed, you actually agreed with that suggestion and said "I'm happy with that."
Mankind is leaving a dreadful and indelible mark on the planet it inhabits, but that's to be expected given its inherent ignorance, arrogance and stupidity.
I have no privileged position whatsoever and I'm certainly not attempting to dictate how people should act in any way, shape or form. I am merely outlining my disgust with my own species based on my own experiences of what I see, hear and read every single day of my life.